Scissors construction



Nov. 27, 1962 E. L: ZEPF 3,065,542

SCISSORS CONSTRUCTION Filed Dec. 6, 1961 FIGA FIG.I

Illlllllllllllllllll 5 FIG 5 INVENTOR.

ERNST L. ZEPF Y MWM Z 44 ATTORNEYS FIG.6

United States Patent Ofilice 3&55542 Patented Nov. 2'7, 1962 3,065,542 SCISSDRS CQNSTRUCTHON Ernst L. Zepf, Tuttlin en, Wurttemberg, Germany, assignor f fifty percent to August Klenk, Maspeth, NQY. Filed Dec. 6, W61, Ser. No. 157,536 8 Claims. (Cl. 59-266) This invention relates in general to scissors and shears constructions, and in particular to a new and useful scissors or shears having means for adjusting the cutting action thereof.

Prior to the present invention, it has been known to provide means for adjusting the cutting action of cooperating scissors blades such as by providing a threadable bolt member at the location of the pivot for such blades to vary the tension acting to hold the blades together. A disadvantage in such constructions is that after a few movements of operation of the blades for the purpose of cutting, the bolt tensioning members loosen and the cooperable action of the blades must be readjusted. Where additional means are provided to lock the threaded bolt elements in the adjusted position, such means have the disadvantage that they tend to become wedged in a locked position, become misaligned from the associated bolt members, and tend to wear rapidly.

In accordance with the present invention, there is provided an improved scissors construction which includes a first blade having a bore or an opening therethrough at its pivot location with an upstanding collar member formed around the bore and projecting into a slightly larger bore of the other scissors element. The other scissors element may pivot easily about the collar member. The collar bore aligns with the bore of the first scissors blade element to permit insertion of a tensioning bolt element or lever member which is threaded on one side to receive an adjusting nut and carries a lever arm portion on its opposite end which extends outwardly and includes a widened tip portion or nose whiih is adapted to press downwardly against the adjacent blade element. The nose forms a fulcrum point to permit tension to be applied at such location through the lever arm portion. :The cutting action for the scissors may be easily adjusted by rotating the adjusting nut to vary the tension acting to hold the blades together by causing the nose on the end of the lever arm to press downwardly against the adjacent blade.

A feature of the construction is that the collar or sleeve member which is located adjacent the lever portion of the tensioning bolt provides a shoulder which aligns the lever portion along the axis of the remotely underlying blade or the blade to which the collar member is affixed. Thus, when the scissors blades are pivoted during cutting action, the lever member through the nose is made to bear against the adjacent blade and is held thereagainst in a stationary position by the sleeve member so that it may not be moved by the pivotal movement of the adjacent scissors blade. With the inventive construction, it is possible to use the single tensioning bolt member with an adjusting screw for adjusting the tension between scissors blades and the cutting action thereof.

Accordingly, it is an object of this invention to provide an improved scissors construction.

A further object of the invention is to provide a scissors including cooperating blade elements which are pivotal about a bolt member which includes a projecting lever arm portion adapted to overlie and bear against one of the blade elements and further including an adjustable nut overlying the opposite blade element and threadable on the bolt member for adjusting the tensioning between the scissors blades.

A further object of the invention is to provide a scissors blade construction which includes a first blade having a pivot bore defined therethrough, a second blade having a sleeve element extending therethrough and defining a second pivot blade bore in alignment with said first blade pivot bore, and further including a bolt element having one portion adjacent the collar member extending outwardly from the bore at a spaced location from the face of the blade and having a portion bearing downwardly at its outer end against the associated blade, the collar member holding the bolt member against rotation, and in cluding an adjusting nut threadable on the opposite side of the bolt member for varying the tension at which the projecting point bears against the associated blade and hence the tension between the blades.

A further object of the invent-ion is to provide a scissors construction which is simple in design, rugged in construction and economical to manufacture.

The various features of novelty which characterize the invention are pointed out with particularity in the claims annexed to and forming a part of this specification. For a better understanding of the invention, its operating advantages and specific objects attained by its use, reference should be had to the accompanying drawings and descriptive matter in which there is illustrated and described a preferred embodiment of the invention.

In the drawings:

FIG. 1 is a fragmentary side elevation of a scissors having means for adjusting the cutting action of the blades, constructed in accordance with the invention;

FIG. 2 is a somewhat enlarged fragmentary elevation and partial section of the scissors indicated in FIG. 1;

FIG. 3 is a plan view of the scissors indicated in FIG. 1 with the blades opened;

FIG. 4 is an elevational view of the tensioning bolt member;

FIG. 5 is an elevational view of the adapting nut; and

FIG. 6 is an enlarged plan view indicating the tensioning bolt member held in position by the surrounding sleeve or collar member.

Referring to the drawings in particular, the invention embodied therein includes a scissors generally designated 10 having cooperable lower and upper blades or blade elements 1 and 2, which are pivotal about an elongated body portion 12 of a tensioning bolt member generally designated 14.

In accordance with the invention, a sleeve or collar member generally designated 6 is either formed integrally with or secured to the lower blade element 1 in vertical alignment with a pivot bore or opening 16 defined therein. The bore or opening 13 of the collar member 6 is substantially the same size as the bore or opening 16 of the lower scissors element 1 and receives the body portion 12 of the tensioning bolt member 14.

The upper portion of the collar member 6 includes lateral shoulders or walls 6a and 6b which are substantially parallel to the longitudinal axis of the blade 1 and act to confine a lever arm portion 3 of the tensioning bolt member 14 in a position parallel to the axis of the blade 1. The outer end of the lever arm portion 3 is either bent downwardly or includes a protuberance 4 which bears against the outer face of the upper blade element 2. An adjusting nut 5 is threaded onto the opposite end of the tensioning bolt member 14.

When the tensioning bolt member 14 is drawn into the sleeve by the threading of the adjusting nut 5 onto the body portion 12, the protuberance 4, dependent on the amount of tensioning as set by the nut 5, is drawn against the surface of the blade 2, the lever arm 3 flexing by a small amount to permit such tensioning.

With the invention, it has been determined that the cutting action of the scissors blades 1 and 2 can be adjusted easily, rapidly and in simple manner. Once the tensioning value has been set by adjusting the nut 5, there armportion includes a p onfipfi extending substantially f s id e g m pmvemingj mmtive. mGmm-m said levmfr al rn pp 

